As for the technicality. Using alloys, a material mainly used for spacecraft seems fitting for transportation aka cars, trains, etc, or just aircrafts and ships. Hell it makes sense for an overly millitaristic society to use alloys to make consumer goods, as they would pride themselves on a spartan way of life where decor and goods are made of hard materials. It could also be an argument for recycling, as using really good alloys for cars makes cars last longer, using them for tables makes tables last longer and if something breaks you can recycle the materials more easily. In fact I'd argue a -10% consumer goods use on the planet could be a cool planet-unique building effect for a recycling themed building like that.